Okay, I'm confused. Soory :/. Just trying to make sure I have this right. You said that your ancestor, Archibald Colquhoun came over with his mother (Mary___) and her husband (Dougal Carmichal)...then you said with his sister Ann and Archibald......are there two Archibalds? Also, was Mary previously with the Colquhoun last name of her former husband, thus passing the Colquhoun name to Archibald, and not Charmichal?
I know that there were quite a few Colquhouns that came over (mostly in and around the NC area as land to the north of this had been taken by then), and I do remember one being a remarriage, and as a step-father. I know that the names Archibald and Mary occured quite a few times in the family and was also passed down.
My 'Archibald ancestor' would have been born around 1770 in Scotland and by the last name Colquhoun...he was married to a Mary (unsure of her maiden name but believe her parents were a Ducan/Duncan Colquhoun and a Florence Lamond.....making her likely a cousin to Archibald and already with the last name Colquhoun! Whoa! Another interesting bit...I have Charmichaels in my family too, from Scotland, who married Carters...